/* * HEVC video decoder * * Copyright (C) 2012 - 2013 Guillaume Martres * Copyright (C) 2013 Seppo Tomperi * Copyright (C) 2013 Wassim Hamidouche * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "libavutil/common.h"#include "libavutil/internal.h" #include "hevcdec.h"#include "progressframe.h" #define LUMA 0#define CB 1#define CR 2 static const uint8_t tctable[54] = {    0, 0, 0, 0, 0, 0, 0,  0,  0,  0,  0,  0,  0,  0,  0,  0, 0, 0, 1, // QP  0...18    1, 1, 1, 1, 1, 1, 1,  1,  2,  2,  2,  2,  3,  3,  3,  3, 4, 4, 4, // QP 19...37    5, 5, 6, 6, 7, 8, 9, 10, 11, 13, 14, 16, 18, 20, 22, 24           // QP 38...53}; static const uint8_t betatable[52] = {     0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  6,  7,  8, // QP 0...18     9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, // QP 19...37    38, 40, 42, 44, 46, 48, 50, 52, 54, 56, 58, 60, 62, 64                      // QP 38...51}; static int chroma_tc(const HEVCPPS *pps, const HEVCSPS *sps,                     int qp_y, int c_idx, int tc_offset){    static const int qp_c[] = {        29, 30, 31, 32, 33, 33, 34, 34, 35, 35, 36, 36, 37, 37    };    int qp, qp_i, offset, idxt;     // slice qp offset is not used for deblocking    if (c_idx == 1)        offset = pps->cb_qp_offset;    else        offset = pps->cr_qp_offset;     qp_i = av_clip(qp_y + offset, 0, 57);    if (sps->chroma_format_idc == 1) {        if (qp_i < 30)            qp = qp_i;        else if (qp_i > 43)            qp = qp_i - 6;        else            qp = qp_c[qp_i - 30];    } else {        qp = av_clip(qp_i, 0, 51);    }     idxt = av_clip(qp + DEFAULT_INTRA_TC_OFFSET + tc_offset, 0, 53);    return tctable[idxt];} static int get_qPy_pred(HEVCLocalContext *lc, const HEVCContext *s,                        const HEVCLayerContext *l,                        const HEVCPPS *pps, const HEVCSPS *sps,                        int xBase, int yBase, int log2_cb_size){    int ctb_size_mask        = (1 << sps->log2_ctb_size) - 1;    int MinCuQpDeltaSizeMask = (1 << (sps->log2_ctb_size -                                      pps->diff_cu_qp_delta_depth)) - 1;    int xQgBase              = xBase - (xBase & MinCuQpDeltaSizeMask);    int yQgBase              = yBase - (yBase & MinCuQpDeltaSizeMask);    int min_cb_width         = sps->min_cb_width;    int x_cb                 = xQgBase >> sps->log2_min_cb_size;    int y_cb                 = yQgBase >> sps->log2_min_cb_size;    int availableA           = (xBase   & ctb_size_mask) &&                               (xQgBase & ctb_size_mask);    int availableB           = (yBase   & ctb_size_mask) &&                               (yQgBase & ctb_size_mask);    int qPy_pred, qPy_a, qPy_b;     // qPy_pred    if (lc->first_qp_group || (!xQgBase && !yQgBase)) {        lc->first_qp_group = !lc->tu.is_cu_qp_delta_coded;        qPy_pred = s->sh.slice_qp;    } else {        qPy_pred = lc->qPy_pred;    }     // qPy_a    if (availableA == 0)        qPy_a = qPy_pred;    else        qPy_a = l->qp_y_tab[(x_cb - 1) + y_cb * min_cb_width];     // qPy_b    if (availableB == 0)        qPy_b = qPy_pred;    else        qPy_b = l->qp_y_tab[x_cb + (y_cb - 1) * min_cb_width];     av_assert2(qPy_a >= -sps->qp_bd_offset && qPy_a < 52);    av_assert2(qPy_b >= -sps->qp_bd_offset && qPy_b < 52);     return (qPy_a + qPy_b + 1) >> 1;} void ff_hevc_set_qPy(HEVCLocalContext *lc,                     const HEVCLayerContext *l, const HEVCPPS *pps,                     int xBase, int yBase, int log2_cb_size){    const HEVCSPS   *const sps = pps->sps;    const HEVCContext *const s = lc->parent;    int qp_y = get_qPy_pred(lc, s, l, pps, sps, xBase, yBase, log2_cb_size);     if (lc->tu.cu_qp_delta != 0) {        int off = sps->qp_bd_offset;        lc->qp_y = FFUMOD(qp_y + lc->tu.cu_qp_delta + 52 + 2 * off,                                 52 + off) - off;    } else        lc->qp_y = qp_y;} static int get_qPy(const HEVCSPS *sps, const int8_t *qp_y_tab, int xC, int yC){    int log2_min_cb_size  = sps->log2_min_cb_size;    int x                 = xC >> log2_min_cb_size;    int y                 = yC >> log2_min_cb_size;    return qp_y_tab[x + y * sps->min_cb_width];} static void copy_CTB(uint8_t *dst, const uint8_t *src, int width, int height,                     ptrdiff_t stride_dst, ptrdiff_t stride_src){    int i, j;     if (((intptr_t)dst | (intptr_t)src | stride_dst | stride_src) & 15) {        for (i = 0; i < height; i++) {            for (j = 0; j < width - 7; j+=8)                AV_COPY64U(dst+j, src+j);            dst += stride_dst;            src += stride_src;        }        if (width&7) {            dst += ((width>>3)<<3) - stride_dst * height;            src += ((width>>3)<<3) - stride_src * height;            width &= 7;            for (i = 0; i < height; i++) {                for (j = 0; j < width; j++)                    dst[j] = src[j];                dst += stride_dst;                src += stride_src;            }        }    } else {        for (i = 0; i < height; i++) {            for (j = 0; j < width; j+=16)                AV_COPY128(dst+j, src+j);            dst += stride_dst;            src += stride_src;        }    }} static void copy_pixel(uint8_t *dst, const uint8_t *src, int pixel_shift){    if (pixel_shift)        *(uint16_t *)dst = *(uint16_t *)src;    else        *dst = *src;} static void copy_vert(uint8_t *dst, const uint8_t *src,                      int pixel_shift, int height,                      ptrdiff_t stride_dst, ptrdiff_t stride_src){    int i;    if (pixel_shift == 0) {        for (i = 0; i < height; i++) {            *dst = *src;            dst += stride_dst;            src += stride_src;        }    } else {        for (i = 0; i < height; i++) {            *(uint16_t *)dst = *(uint16_t *)src;            dst += stride_dst;            src += stride_src;        }    }} static void copy_CTB_to_hv(const HEVCLayerContext *l, const HEVCSPS *sps,                           const uint8_t *src,                           ptrdiff_t stride_src, int x, int y, int width, int height,                           int c_idx, int x_ctb, int y_ctb){    int sh = sps->pixel_shift;    int w = sps->width >> sps->hshift[c_idx];    int h = sps->height >> sps->vshift[c_idx];     /* copy horizontal edges */    memcpy(l->sao_pixel_buffer_h[c_idx] + (((2 * y_ctb) * w + x) << sh),        src, width << sh);    memcpy(l->sao_pixel_buffer_h[c_idx] + (((2 * y_ctb + 1) * w + x) << sh),        src + stride_src * (height - 1), width << sh);     /* copy vertical edges */    copy_vert(l->sao_pixel_buffer_v[c_idx] + (((2 * x_ctb) * h + y) << sh), src, sh, height, 1 << sh, stride_src);     copy_vert(l->sao_pixel_buffer_v[c_idx] + (((2 * x_ctb + 1) * h + y) << sh), src + ((width - 1) << sh), sh, height, 1 << sh, stride_src);} static void restore_tqb_pixels(const HEVCLayerContext *l,                               const HEVCPPS *pps, const HEVCSPS *sps,                               uint8_t *src1, const uint8_t *dst1,                               ptrdiff_t stride_src, ptrdiff_t stride_dst,                               int x0, int y0, int width, int height, int c_idx){    if (pps->transquant_bypass_enable_flag ||        (sps->pcm_loop_filter_disabled && sps->pcm_enabled)) {        int x, y;        int min_pu_size  = 1 << sps->log2_min_pu_size;        int hshift       = sps->hshift[c_idx];        int vshift       = sps->vshift[c_idx];        int x_min        = ((x0         ) >> sps->log2_min_pu_size);        int y_min        = ((y0         ) >> sps->log2_min_pu_size);        int x_max        = ((x0 + width ) >> sps->log2_min_pu_size);        int y_max        = ((y0 + height) >> sps->log2_min_pu_size);        int len          = (min_pu_size >> hshift) << sps->pixel_shift;        for (y = y_min; y < y_max; y++) {            for (x = x_min; x < x_max; x++) {                if (l->is_pcm[y * sps->min_pu_width + x]) {                    int n;                    uint8_t *src = src1 +                         (((y << sps->log2_min_pu_size) - y0) >> vshift) * stride_src +                        ((((x << sps->log2_min_pu_size) - x0) >> hshift) << sps->pixel_shift);                    const uint8_t *dst = dst1 +                         (((y << sps->log2_min_pu_size) - y0) >> vshift) * stride_dst +                        ((((x << sps->log2_min_pu_size) - x0) >> hshift) << sps->pixel_shift);                     for (n = 0; n < (min_pu_size >> vshift); n++) {                        memcpy(src, dst, len);                        src += stride_src;                        dst += stride_dst;                    }                }            }        }    }} #define CTB(tab, x, y) ((tab)[(y) * sps->ctb_width + (x)]) static void sao_filter_CTB(HEVCLocalContext *lc, const HEVCLayerContext *l,                           const HEVCContext *s,                           const HEVCPPS *pps, const HEVCSPS *sps,                           int x, int y){    static const uint8_t sao_tab[8] = { 0, 1, 2, 2, 3, 3, 4, 4 };    int c_idx;    int edges[4];  // 0 left 1 top 2 right 3 bottom    int x_ctb                = x >> sps->log2_ctb_size;    int y_ctb                = y >> sps->log2_ctb_size;    int ctb_addr_rs          = y_ctb * sps->ctb_width + x_ctb;    int ctb_addr_ts          = pps->ctb_addr_rs_to_ts[ctb_addr_rs];    SAOParams *sao           = &CTB(l->sao, x_ctb, y_ctb);    // flags indicating unfilterable edges    uint8_t vert_edge[]      = { 0, 0 };    uint8_t horiz_edge[]     = { 0, 0 };    uint8_t diag_edge[]      = { 0, 0, 0, 0 };    uint8_t lfase            = CTB(l->filter_slice_edges, x_ctb, y_ctb);    uint8_t no_tile_filter   = pps->tiles_enabled_flag &&                               !pps->loop_filter_across_tiles_enabled_flag;    uint8_t restore          = no_tile_filter || !lfase;    uint8_t left_tile_edge   = 0;    uint8_t right_tile_edge  = 0;    uint8_t up_tile_edge     = 0;    uint8_t bottom_tile_edge = 0;     edges[0]   = x_ctb == 0;    edges[1]   = y_ctb == 0;    edges[2]   = x_ctb == sps->ctb_width  - 1;    edges[3]   = y_ctb == sps->ctb_height - 1;     if (restore) {        if (!edges[0]) {            left_tile_edge  = no_tile_filter && pps->tile_id[ctb_addr_ts] != pps->tile_id[pps->ctb_addr_rs_to_ts[ctb_addr_rs-1]];            vert_edge[0]    = (!lfase && CTB(l->tab_slice_address, x_ctb, y_ctb) != CTB(l->tab_slice_address, x_ctb - 1, y_ctb)) || left_tile_edge;        }        if (!edges[2]) {            right_tile_edge = no_tile_filter && pps->tile_id[ctb_addr_ts] != pps->tile_id[pps->ctb_addr_rs_to_ts[ctb_addr_rs+1]];            vert_edge[1]    = (!lfase && CTB(l->tab_slice_address, x_ctb, y_ctb) != CTB(l->tab_slice_address, x_ctb + 1, y_ctb)) || right_tile_edge;        }        if (!edges[1]) {            up_tile_edge     = no_tile_filter && pps->tile_id[ctb_addr_ts] != pps->tile_id[pps->ctb_addr_rs_to_ts[ctb_addr_rs - sps->ctb_width]];            horiz_edge[0]    = (!lfase && CTB(l->tab_slice_address, x_ctb, y_ctb) != CTB(l->tab_slice_address, x_ctb, y_ctb - 1)) || up_tile_edge;        }        if (!edges[3]) {            bottom_tile_edge = no_tile_filter && pps->tile_id[ctb_addr_ts] != pps->tile_id[pps->ctb_addr_rs_to_ts[ctb_addr_rs + sps->ctb_width]];            horiz_edge[1]    = (!lfase && CTB(l->tab_slice_address, x_ctb, y_ctb) != CTB(l->tab_slice_address, x_ctb, y_ctb + 1)) || bottom_tile_edge;        }        if (!edges[0] && !edges[1]) {            diag_edge[0] = (!lfase && CTB(l->tab_slice_address, x_ctb, y_ctb) != CTB(l->tab_slice_address, x_ctb - 1, y_ctb - 1)) || left_tile_edge || up_tile_edge;        }        if (!edges[1] && !edges[2]) {            diag_edge[1] = (!lfase && CTB(l->tab_slice_address, x_ctb, y_ctb) != CTB(l->tab_slice_address, x_ctb + 1, y_ctb - 1)) || right_tile_edge || up_tile_edge;        }        if (!edges[2] && !edges[3]) {            diag_edge[2] = (!lfase && CTB(l->tab_slice_address, x_ctb, y_ctb) != CTB(l->tab_slice_address, x_ctb + 1, y_ctb + 1)) || right_tile_edge || bottom_tile_edge;        }        if (!edges[0] && !edges[3]) {            diag_edge[3] = (!lfase && CTB(l->tab_slice_address, x_ctb, y_ctb) != CTB(l->tab_slice_address, x_ctb - 1, y_ctb + 1)) || left_tile_edge || bottom_tile_edge;        }    }     for (c_idx = 0; c_idx < (sps->chroma_format_idc ? 3 : 1); c_idx++) {        int x0       = x >> sps->hshift[c_idx];        int y0       = y >> sps->vshift[c_idx];        ptrdiff_t stride_src = s->cur_frame->f->linesize[c_idx];        int ctb_size_h = (1 << (sps->log2_ctb_size)) >> sps->hshift[c_idx];        int ctb_size_v = (1 << (sps->log2_ctb_size)) >> sps->vshift[c_idx];        int width    = FFMIN(ctb_size_h, (sps->width  >> sps->hshift[c_idx]) - x0);        int height   = FFMIN(ctb_size_v, (sps->height >> sps->vshift[c_idx]) - y0);        int tab      = sao_tab[(FFALIGN(width, 8) >> 3) - 1];        uint8_t *src = &s->cur_frame->f->data[c_idx][y0 * stride_src + (x0 << sps->pixel_shift)];        ptrdiff_t stride_dst;        uint8_t *dst;         switch (sao->type_idx[c_idx]) {        case SAO_BAND:            copy_CTB_to_hv(l, sps, src, stride_src, x0, y0, width, height, c_idx,                           x_ctb, y_ctb);            if (pps->transquant_bypass_enable_flag ||                (sps->pcm_loop_filter_disabled && sps->pcm_enabled)) {                dst = lc->edge_emu_buffer;                stride_dst = 2*MAX_PB_SIZE;                copy_CTB(dst, src, width << sps->pixel_shift, height, stride_dst, stride_src);                s->hevcdsp.sao_band_filter[tab](src, dst, stride_src, stride_dst,                                                sao->offset_val[c_idx], sao->band_position[c_idx],                                                width, height);                restore_tqb_pixels(l, pps, sps, src, dst, stride_src, stride_dst,                                   x, y, width, height, c_idx);            } else {                s->hevcdsp.sao_band_filter[tab](src, src, stride_src, stride_src,                                                sao->offset_val[c_idx], sao->band_position[c_idx],                                                width, height);            }            sao->type_idx[c_idx] = SAO_APPLIED;            break;        case SAO_EDGE:        {            int w = sps->width >> sps->hshift[c_idx];            int h = sps->height >> sps->vshift[c_idx];            int left_edge = edges[0];            int top_edge = edges[1];            int right_edge = edges[2];            int bottom_edge = edges[3];            int sh = sps->pixel_shift;            int left_pixels, right_pixels;             stride_dst = 2*MAX_PB_SIZE + AV_INPUT_BUFFER_PADDING_SIZE;            dst = lc->edge_emu_buffer + stride_dst + AV_INPUT_BUFFER_PADDING_SIZE;             if (!top_edge) {                int left = 1 - left_edge;                int right = 1 - right_edge;                const uint8_t *src1[2];                uint8_t *dst1;                int src_idx, pos;                 dst1 = dst - stride_dst - (left << sh);                src1[0] = src - stride_src - (left << sh);                src1[1] = l->sao_pixel_buffer_h[c_idx] + (((2 * y_ctb - 1) * w + x0 - left) << sh);                pos = 0;                if (left) {                    src_idx = (CTB(l->sao, x_ctb-1, y_ctb-1).type_idx[c_idx] ==                               SAO_APPLIED);                    copy_pixel(dst1, src1[src_idx], sh);                    pos += (1 << sh);                }                src_idx = (CTB(l->sao, x_ctb, y_ctb-1).type_idx[c_idx] ==                           SAO_APPLIED);                memcpy(dst1 + pos, src1[src_idx] + pos, width << sh);                if (right) {                    pos += width << sh;                    src_idx = (CTB(l->sao, x_ctb+1, y_ctb-1).type_idx[c_idx] ==                               SAO_APPLIED);                    copy_pixel(dst1 + pos, src1[src_idx] + pos, sh);                }            }            if (!bottom_edge) {                int left = 1 - left_edge;                int right = 1 - right_edge;                const uint8_t *src1[2];                uint8_t *dst1;                int src_idx, pos;                 dst1 = dst + height * stride_dst - (left << sh);                src1[0] = src + height * stride_src - (left << sh);                src1[1] = l->sao_pixel_buffer_h[c_idx] + (((2 * y_ctb + 2) * w + x0 - left) << sh);                pos = 0;                if (left) {                    src_idx = (CTB(l->sao, x_ctb-1, y_ctb+1).type_idx[c_idx] ==                               SAO_APPLIED);                    copy_pixel(dst1, src1[src_idx], sh);                    pos += (1 << sh);                }                src_idx = (CTB(l->sao, x_ctb, y_ctb+1).type_idx[c_idx] ==                           SAO_APPLIED);                memcpy(dst1 + pos, src1[src_idx] + pos, width << sh);                if (right) {                    pos += width << sh;                    src_idx = (CTB(l->sao, x_ctb+1, y_ctb+1).type_idx[c_idx] ==                               SAO_APPLIED);                    copy_pixel(dst1 + pos, src1[src_idx] + pos, sh);                }            }            left_pixels = 0;            if (!left_edge) {                if (CTB(l->sao, x_ctb-1, y_ctb).type_idx[c_idx] == SAO_APPLIED) {                    copy_vert(dst - (1 << sh),                              l->sao_pixel_buffer_v[c_idx] + (((2 * x_ctb - 1) * h + y0) << sh),                              sh, height, stride_dst, 1 << sh);                } else {                    left_pixels = 1;                }            }            right_pixels = 0;            if (!right_edge) {                if (CTB(l->sao, x_ctb+1, y_ctb).type_idx[c_idx] == SAO_APPLIED) {                    copy_vert(dst + (width << sh),                              l->sao_pixel_buffer_v[c_idx] + (((2 * x_ctb + 2) * h + y0) << sh),                              sh, height, stride_dst, 1 << sh);                } else {                    right_pixels = 1;                }            }             copy_CTB(dst - (left_pixels << sh),                     src - (left_pixels << sh),                     (width + left_pixels + right_pixels) << sh,                     height, stride_dst, stride_src);             copy_CTB_to_hv(l, sps, src, stride_src, x0, y0, width, height, c_idx,                           x_ctb, y_ctb);            s->hevcdsp.sao_edge_filter[tab](src, dst, stride_src, sao->offset_val[c_idx],                                            sao->eo_class[c_idx], width, height);            s->hevcdsp.sao_edge_restore[restore](src, dst,                                                stride_src, stride_dst,                                                sao,                                                edges, width,                                                height, c_idx,                                                vert_edge,                                                horiz_edge,                                                diag_edge);            restore_tqb_pixels(l, pps, sps, src, dst, stride_src, stride_dst,                               x, y, width, height, c_idx);            sao->type_idx[c_idx] = SAO_APPLIED;            break;        }        }    }} static int get_pcm(const HEVCSPS *sps, const uint8_t *is_pcm, int x, int y){    int log2_min_pu_size = sps->log2_min_pu_size;    int x_pu, y_pu;     if (x < 0 || y < 0)        return 2;     x_pu = x >> log2_min_pu_size;    y_pu = y >> log2_min_pu_size;     if (x_pu >= sps->min_pu_width || y_pu >= sps->min_pu_height)        return 2;    return is_pcm[y_pu * sps->min_pu_width + x_pu];} #define TC_CALC(qp, bs)                                                 \    tctable[av_clip((qp) + DEFAULT_INTRA_TC_OFFSET * ((bs) - 1) +       \                    (tc_offset & -2),                                   \                    0, MAX_QP + DEFAULT_INTRA_TC_OFFSET)] 

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